# Concept Lessons

### The power of photons

A brief introduction to photonics and why it is valuable

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### Quantum optics

A brief introduction to quantum optics, non-linear optics, and quantum effects.

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### Storing information in light

This lesson will tackle the questions of how information is stored in light, and how can it be used for computation.

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### Computing with only a few light particles

this lesson will explain why it is easier to see quantum mechanics with fewer particles.

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### Complexity theory, P and NP

This lesson will discuss the famous P vs NP conjecture and the implications it has computing.

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### Interaction graph connectivity

One of the primary value props of QCi's entropy quantum computing systems it that they have all-to-all connectivity. This lesson will explain why that is valuable.

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### Combinatorial optimization problems

The problems which our entropy quantum computing devices aim to solve are known as combinatorial optimization problems. This lesson will explain what those are and why they are valuable to be solved.

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### Qudit basics

Dirac-3 and other entropy quantum computers are a form of unconventional analog system that uses qudits instead of qubits. This lesson will explain the basics of this paradigm.

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### Entropy Quantum Computing overview

A brief introduction to entropy quantum computing (EQC)

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### Reservoir Computing overview

A brief introduction to reservoir photonic computing

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### Cybersecurity overview

A brief high level description of QCi's approach to cybersecurity

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### The Zeno Blockade

For a Zeno blockade, we consider a nonlinear cavity that can perform sum-frequency generation

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### The Quantum Zeno Effect

In order for a system to perform a computation, the components within the computer need to be able to interact with each other.

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### Ising models

The text introduces Ising models and how they can be used for solving complex optimization problems, particularly NP-hard problems.

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### Unconventional Computing

Unconventional computing is any type of computing done in a way that is not the usual way, and it has some very import implications discussed here.

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### Multibody Interactions

The ability to directly implement multibody interactions is part of what makes QCi hardware powerful, and this lesson will explain why.